I think Dave perry debunking of lee bowing is nonsense. In my racing
it's clearly understood that if you re racing
towards a fixed windward mark and with a right angle current
the quickest way to the mark is to put the current
under the lee bow. Firstly you get pushed up towards the mark this allows to free off and hence travel faster. Equally when the tack comes to lay the mark. The current will be behind the boat. I race
at times on a big river, lee bowing is very evident. Lee Bowing has no effect if the destination
referenced. Think about it both boats start off at one side of the river to race
to a mark directly to windward, ( say mark at 90) fixed to the bed
of the river. The current runs from left to right. Both boats can sail equally hard to the wind. The one that keeps the current on the port side will have a shorter distance to round the mark. That's my understanding of the term.
As to the true Wind debate. Mariners for years could not compute true Wind. What they used ie boat speed sufficed most of the time so they used the term. With the arrival of gps
it is possible to compute "true" ie ground wind. What should have changed was to drop the term true wind as its calculated using stw. Maybe this should have been renamed. "real wind" or something.
True wind has little use to most cruisers other then in an attempt to relate to what's really out there, most cruisers are using "true" wind to actually judge ground wind. The reason why others have never heard the term ground wind is that of course it was a solution to get instrument companies out of a hole.